User manual

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When you are unable to answer the call, you can transfer to another
number.

Go to "Call" >
"settings"
> "Carrier Call Settings" > "Call
Forwarding".
 Select a call forwarding condition such as "When busy", "When
unanswered" and "When unreachable", and enter the number to
activate the call forwarding.
 Call forwarding service will be varied as it is based on by the carrier.
Call Waiting
You cannot answer the other calls if you don't hang up on the ongoing
call. Turn on "Call Waiting" to get a notification when there is an
incoming call.

Go to "Call" >
"settings"
> "Carrier Call Settings" >
"Additional Settings" > "Call Waiting".
Multi-Operations During a Call
Adjust the Audio